CN106753543A - Based on the crude oil desalting method that solvent extraction is coupled with electro-desalting - Google Patents
Based on the crude oil desalting method that solvent extraction is coupled with electro-desalting Download PDFInfo
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- CN106753543A CN106753543A CN201611020612.2A CN201611020612A CN106753543A CN 106753543 A CN106753543 A CN 106753543A CN 201611020612 A CN201611020612 A CN 201611020612A CN 106753543 A CN106753543 A CN 106753543A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
- C10G53/04—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one extraction step
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1033—Oil well production fluids
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Abstract
The present invention is based on the crude oil desalting method that solvent extraction is coupled with electro-desalting, and its process object is：It is 0.96~1.2g/cm by secondary, tertiary recovery density3, emulsification is serious, be difficult to be realized by profit density contrast the crude oil of sedimentation separation under normal circumstances, contains following steps：(1) extractant is injected；(2) one-level extraction desalination；(3) the crude oil after one-level extraction desalination is separated with extractant；(4) secondary injection extractant：(5) two grades of extraction desalinations；(6) the crude oil after two grades of extraction desalinations is separated with extractant.Above-mentioned steps can increase the series of " extraction desalination " according to the requirement of desalination depth.Present invention extractant substitutes water filling and adds demulsifier, and the method coupled with electro-desalting using solvent extraction can increase the desalting efficiency of above-mentioned crude oil, and applied widely；Requirement not only to electric field is low, save energy, and operating cost is low；Desalination can be carried out using existing equipment, with efficient desalting effect.
Description
Technical field
The present invention relates to technical field of petrochemical industry, and in particular to a kind of crude oil coupled with electro-desalting based on solvent extraction
Desalination process.
Background technology
Main energy sources of the oil in current or various countries.Oil can bring a certain amount of salts substances into recovery process,
And with two to crude oil, tertiary recovery, the salt content in oil can be increasing, especially NaCl, CaCl2、MgCl2Deng
Inorganic salts.The crude oil of saliferous high is especially very harmful to process equipment to follow-up processing, for example：Corrosion device, incrustation scale
Influence heat transfer is piled up, the activity of catalyst is reduced and is blocked pipeline etc..Additionally, processing technology is also more complicated.Therefore, crude oil
Desalination and process technology petrochemical industry problem of interest always.Existing technology has：Phonochemistry method, heat treatment, film point
From and the technique such as electro-desalting, wherein, electric desalting technology is the method for generally using at present.The electric desalting technology be usually
A certain amount of water and demulsifier are injected in crude oil, the salt particle in crude oil is washed with it, salt is completely dissolved in water, in electric field
In the presence of make saliferous water droplet by polarization, deformation, the process such as attract, promote two mutual phase coalescences of droplet, become big and occur
Sedimentation, and then reach the purpose of desalination.
As domestic outer portion oil field enters secondary, tertiary oil recovery, the viscosity and density of crude oil are continuously increased, and emulsification feelings
Condition is more serious, or even the oil density having is close to 1g/cm3, this is difficult to be realized by profit density contrast under normal circumstances
Sedimentation separation.Additionally, people's requirement but more and more higher diversified to crude oil converted products, therefore, in crude oil processing equipment,
Multistage electric desalting apparatus arise at the historic moment.But current, the salt content after multistage electric desalting apparatus desalination in oil be less than
5ppm, this does not reach the requirement of most oil plants still.Therefore, someone is researching and developing new desalinating process in recent years, wherein just including
Using ultrasonic dehydration desalting technology and microwave demulsifying desalting technology, and certain applications are industrially obtained.
Ultrasonic crude-oil demulsification technology mainly uses the mechanical oscillation of ultrasonic wave to act on, and " displacement is imitated to produce drop
Should ", promote the globule to condense, the mechanical strength of oil-water interfacial film is reduced, so as to realize sedimentation separation.And microwave demulsifying desalting technology
In addition to there is the above, moreover it is possible to magnetize the oil molecule of non-polarization, formed with angled eddy flow electricity
, the attractive interaction between molecule can be reduced, play a part of to reduce viscosity of crude, so as to increase the density contrast of profit.It is described
Microwave demulsifying desalting technology is especially suitable for viscous crude and the less crude oil of profit density contrast.
Chinese patent CN101987965A discloses " a kind of composite desalter suitable for crude oil desalting ", and the desalter can
For the electro-desalting of crude oil, but, the desalter synthesis step is cumbersome, it is necessary to by acrylic acid, ammonium acrylate, acid anhydrides, acrylic acid
Ester and attapulgite clay copolymerization are formed, and have certain requirement to the salt content in crude oil：Iron content is less than 200 μ g/g；Calcium
Content is less than 2000 μ g/g；Calcium content can only drop to 18 μ g/g, and whole electro-desalting course of reaction is up to 7 hours.
Chinese patent CN105482848A discloses " a kind of crude oil desalting complexing agent and preparation method thereof ", the complexing agent
Complexity is prepared, it is necessary to prepare maleic anhydride modified phenol amine polyether compound, consisting of phase-transferring agent, organic amine, the asphalt adhesive of corresponding proportion
Matter dispersant and auxiliary agent, and it is unobvious to low colloid, the Desalting and Dewatering from Crude Oil effect of low asphalitine, needed when crude oil is pre-processed
Manual mixing 200 times are wanted, it is excessively cumbersome, by can just make salt content reach 2.65mg/L after three-level electro-desalting.
Chinese patent CN105038842A is disclosed " a kind of electric desalting and dewatering technique ", and this technique needs to add 6.5%
Fresh water, makes the salt being suspended in crude oil be substantially dissolved in fresh water, because with uncertain factor, so adding demulsification
Agent carries out secondary desalting and dewatering.The whole process of the technique electric desalting and dewatering will be carried out in the case of high temperature high electric field, and energy consumption is big,
So, the patent is not referred to the efficiency of the accessible specific desalting and dewatering of this electric desalting and dewatering technique.
Chinese patent CN103289729A discloses " a kind of crude oil desalting method and device of electric field-eddy flow combination ", tower
For oil be originate from Iran, doping 25% mink cell focus, first using electro-desalting method：Water filling, adds demulsifier, carries out
One-level electro-desalting, then carry out hydrocyclone desalting, wherein, one-level electro-desalting the results are shown in Table shown in 1：Put from one-level electrical desalter top
A de- rear crude oil pipeline is drawn at the place of eating dishes without rice or wine, and water is cut from two grades of the two of desalination water injecting pump grades of electro-desalting to its injection, mixed through injection
After clutch is well mixed desalting processing is carried out into eddy flow electro-desalting device；The de- rear crude oil of eddy flow at the top of demineralizer is fuel-displaced with auxiliary
Mouthful crude oil merge after enter two grades of electrical desalter imported crude oil pipelines, the saline sewage of demineralizer bottom is drained into bucket.One
Crude oil after level electro-desalting is again by after hydrocyclone desalting device hydrocyclone desalting, its salt content reduces 0.5~2.8mg/L, used as rear
Processing procedure makes one-level electro-desalting rate improve 8~15%.
The result of the Chinese patent CN103289729A one-level electro-desalting of table 1.
。
Chinese patent CN103320160A discloses " a kind of acid-containing raw oil preprocessing method ", to originate from containing for the Sudan Fula
Sour crude oil is raw material, and acid-containing raw oil is processed by three-level electrical desalting and dewatering device, obtains the acid-containing raw oil after desalting and dewatering.It is first
First, the crude oil is mixed with water, heated stove heat intensification high temperature pyrolysis in heating furnace, the outlet temperature of heating furnace is
430 DEG C, the residence time is 50 minutes, and pressure is 0.4MPa；Subsequently into one-level electric desalting and dewatering, temperature is 120 DEG C, and pressure is
0.5MPa, water injection rate is 6.5w%, plus demulsifier is 9 μ g/g；Two grades of electric desalting and dewaterings are entered back into, temperature is 140 DEG C, and pressure is
0.6MPa, water injection rate is 8w%, plus the μ g/g of demulsifier 20, wherein, it is broken that one-level electric desalting and dewatering and two grades of electric desalting and dewaterings are added
Emulsion is macromolecule nonionic surface active agent；The condition of three-level electric desalting and dewatering is：130 DEG C of temperature, pressure 0.6MPa,
Water injection rate is 12%, plus demulsifier 10ppm.Its desalting effect is：Single stage desalting effect 10.2mg/L, two grades of desalting effects are
2.6mg/L。
Current industrialized crude oil desalting technique is mainly what is carried out by water filling and addition demulsifier, and it is noted
The influence of the factor such as water, demulsifier species and consumption, desalination temperature, electric-field intensity, mixing intensity, residence time, therefore, breast
Change phenomenon serious, and existing technique can not thoroughly solve the problems, such as emulsification, therefore, demulsification（Change）Split-phase is realized, as raising
The key of desalting efficiency.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of to be taken off based on the crude oil that solvent extraction is coupled with electro-desalting
Salt method, it emulsified in crude oil using extractant it is low, have to salt fine solubility property and crude oil have certain density contrast,
Segregative feature, substitutes water filling and adds demulsifier using extractant, viscosity-density of the increase to secondary, tertiary recovery etc.
High, emulsification seriously, is under normal circumstances difficult to the desalting efficiency of the crude oil that sedimentation separation is realized by profit density contrast；Using solvent
The method that extraction is coupled with electro-desalting, energy save energy is low to electric field requirement, can reduce operating cost；Existing process can be utilized
Equipment is operated, with efficient desalting effect.
To achieve the above object, this invention takes following technical scheme.
A kind of crude oil desalting method coupled with electro-desalting based on solvent extraction, it is characterised in that contain following steps：
Deal with objects and be：It is 0.96~1.2g/cm by secondary, tertiary recovery density3, emulsification it is serious, difficult under normal circumstances
To realize the crude oil of sedimentation separation by profit density contrast,
（1）Injection extractant
Extractant is injected in the crude oil, using extractant to the highly dissoluble of salt, the salinity to containing in crude oil takes off
Remove：Enter one-level after the crude oil and the blended valve of extractant in mass ratio 8~20: 1 are sufficiently mixed and extract desalter；
（2）One-level extracts desalination
Using 80~160 DEG C of extraction temperature, 30~60min is stopped in the weak electric field of 300V/cm~600V/cm, in 750V/cm
The highfield of~4000V/cm stops 5~30min, and extraction desalination is carried out using the forceful electric power field intensity of 750V/cm~4000V/cm；
（3）Crude oil after one-level extraction desalination is separated with extractant
Will be by step（2）Crude oil after one-level extraction desalination is discharged through the top of one-level extraction desalter；One-level extraction is de-
The extractant containing sewage saliferous is discharged through the bottom of one-level extraction desalter after salt；
（4）Secondary injection extractant
Will be by step（3）Crude oil after separation enters two after being sufficiently mixed with the blended valve of extractant in mass ratio 8~20: 1
Level extraction desalter；
（5）Two grades of extraction desalinations
Using 80~160 DEG C of extraction temperature, 30~60min is stopped in the weak electric field of 300V/cm~600V/cm, in 750V/cm
The highfield of~4000V/cm stops 5~30min, and extraction desalination is carried out using the forceful electric power field intensity of 750V/cm~4000V/cm；
（6）Crude oil after two grades of extraction desalinations is separated with extractant
Will be by step（5）Crude oil after two grades of extraction desalinations is discharged through the top of two grades of extraction desalters；Two grades of extractions are de-
The extractant containing sewage saliferous is discharged through the bottom of two grades of extraction desalters after salt.
Alternatively, the extractant is ethylene glycol, glycerine, 1,2-PD, 1,3-PD, diethylene glycol list first
Ether, propylene glycol monomethyl ether, dimethyl ether, dimethylamine, di-n-propylamine, cyclopropylamine, one or more of di-iso-butylmanice.
Further, the electric field is alternating current and direct current or impulse electric field.
Further, in step（6）Afterwards, can continue step（6）Crude oil after separation presses quality with fresh extractant
Enter back into next stage extraction desalter after sufficiently mixing than 8~20: 1；Repeat " one-level extraction desalination " and " two grades of extractions are de-
The content of salt ", can increase the series of " extraction desalination " according to the requirement of desalination depth.
The good effect of the crude oil desalting method that the present invention is coupled based on solvent extraction with electro-desalting is：
（1）Water filling is substituted using extractant and demulsifier, the method coupled with electro-desalting using solvent extraction, using extraction is added
Agent emulsified in crude oil it is low, there is fine solubility property and crude oil to have certain density contrast, segregative feature to salt, can increase
The big viscosity-density to secondary, tertiary recovery etc. is high, emulsification seriously, is under normal circumstances difficult to realize settling by profit density contrast
The desalting efficiency of the crude oil of separation；And it is applied widely.
（2）Without water filling and addition demulsifier, energy consumption is not only saved, and reduce operating cost.
（3）Requirement to electric field is low, thus energy consumption is low；Existing process equipment can be directly utilized, extra increase is not required to and is set
Standby investment；Desalting efficiency up to 83.8%, with efficient desalting effect.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the crude oil desalting method that the present invention is coupled based on solvent extraction with electro-desalting.
Specific embodiment
The specific reality of the crude oil desalting method that the present invention is coupled based on solvent extraction with electro-desalting is introduced below in conjunction with accompanying drawing
Apply mode, there is provided 3 embodiments.It should be noted that implementation of the invention is not limited to following implementation method.
Embodiment 1
Referring to Fig. 1.A kind of crude oil desalting method coupled with electro-desalting based on solvent extraction, is respectively adopted the heavy of Shengli Oil Field
Crude oil（Oil density：0.9040~0.9660g/cm3）And high density spy's heavy crude of Qilu Petrochemical（Oil density：﹥
0.9660g/cm3）, the physical property of two batches crude oil is shown in Table 2.
The physical property of the crude oil that 2. embodiment of table 1 is used
。
Contain following steps：
（1）Injection extractant
Using extractant to the highly dissoluble of salt, the salinity to containing in crude oil is removed：Second two is injected in the crude oil
Alcohol（Or using ethylene glycol, glycerine, 1,2- propane diols, 1,3- propane diols, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, dipropyl
Glycol dimethyl ether, dimethylamine, di-n-propylamine, cyclopropylamine, one or more of di-iso-butylmanice）, the crude oil is with ethylene glycol by quality
Valve more blended than 8: 1 enters one-level and extracts desalter after being sufficiently mixed.
（2）One-level extracts desalination
Using 80 DEG C of extraction temperature, desalination, the electric field are carried out using the weak electric field of 300V/cm and the highfield of 4000V/cm
Alternating current and direct current or impulse electric field can be used；30min is stopped in weak electric field, 5min is stopped in highfield, carry out extraction desalination.
（3）Crude oil after one-level extraction desalination is separated with extractant
Will be by step（2）Crude oil after one-level extraction desalination is discharged through the top of one-level extraction desalter；One-level extraction is de-
The extractant containing sewage saliferous is discharged through the bottom of one-level extraction desalter after salt.
（4）Secondary injection extractant
﹝ basic synchronizations are rapid（1）Nei Rong ﹞.Learnt from else's experience step（3）Upper strata crude oil after separation, is analyzed using LC-4 microcoulombs instrument
The salt content of extraction phase and raffinate phase；Then will be by step（3）Crude oil after separation presses 8: 1 after sufficiently mixing with extractant
Into two grades of extraction desalters.
（5）Two grades of extraction desalinations
The same steps of ﹝（2）Nei Rong ﹞.
（6）Crude oil after two grades of extraction desalinations is separated with extractant
Will be by step（5）Crude oil after two grades of extraction desalinations is discharged through the top of two grades of extraction desalters；Two grades of extractions are de-
The extractant containing sewage saliferous is discharged through the bottom of two grades of extraction desalters after salt.
Embodiment 2
Referring to Fig. 1.A kind of crude oil desalting method coupled with electro-desalting based on solvent extraction, the crude oil for the treatment of is with embodiment 1.
Contain following steps：
（1）Injection extractant
Glycerine is injected in the crude oil（Or 1,2- propane diols, 1,3- propane diols, diethylene glycol monomethyl ether, propylene glycol monomethyl ether,
Dimethyl ether, dimethylamine, di-n-propylamine, cyclopropylamine, one or more of di-iso-butylmanice）；By the crude oil and glycerine
In mass ratio 9: 1 blended valves enter one-level and extract desalter after being sufficiently mixed.
（2）One-level extracts desalination
Using 110 DEG C of extraction temperature, desalination, the electricity are carried out using the weak electric field of 600V/cm and the highfield of 1500V/cm
Field can use alternating current and direct current or impulse electric field；60min is stopped in weak electric field, 20min is stopped in highfield, carry out extraction desalination.
（3）Crude oil after one-level extraction desalination is separated with extractant
（With embodiment 1）.
（4）Secondary injection extractant
﹝ is with the present embodiment step（1）﹞.
（5）Two grades of extraction desalinations
﹝ is with the present embodiment step（2）﹞.
（6）Crude oil after two grades of extraction desalinations is separated with extractant
（With embodiment 1）.
（7）Three injection extractants
﹝ is with the present embodiment step（1）﹞.
（8）Three-level extracts desalination
﹝ is with the present embodiment step（2）﹞.
（9）Crude oil after three-level extraction desalination is separated with extractant
﹝ is with the present embodiment step（3）﹞.
Embodiment 3
Referring to Fig. 1.A kind of crude oil desalting method coupled with electro-desalting based on solvent extraction, the crude oil for the treatment of is with embodiment 1.
Contain following steps：
（1）Injection extractant
1,2- propane diols and 1,3- propane diols are injected in the crude oil（Or diethylene glycol monomethyl ether, propylene glycol monomethyl ether, dipropyl
Glycol dimethyl ether, dimethylamine, di-n-propylamine, cyclopropylamine, one or more of di-iso-butylmanice）；By the crude oil and 1,2- propane diols
Enter one-level after sufficiently mixing by 20: 0.5+0.5 with 1,3- propane diols and extract desalter.
（2）One-level extracts desalination
Using 160 DEG C of extraction temperature, desalination, the electric field are carried out using the weak electric field of 450V/cm and the highfield of 750V/cm
Alternating current and direct current or impulse electric field can be used；20min is stopped in weak electric field, 5min is stopped in highfield, carry out extraction desalination.
（3）Crude oil after one-level extraction desalination is separated with extractant
（With embodiment 1）.
（4）Secondary injection extractant
﹝ is with the present embodiment step（1）﹞.
（5）Two grades of extraction desalinations
﹝ is with the present embodiment step（2）﹞.
（6）Crude oil after two grades of extraction desalinations is separated with extractant
（With embodiment 1）.
（7）Three injection extractants
﹝ is with the present embodiment step（1）﹞.
（8）Three-level extracts desalination
﹝ is with the present embodiment step（2）﹞.
（9）Crude oil after three-level extraction desalination is separated with extractant
﹝ is with the present embodiment step（3）﹞.
（10）Four injection extractants
﹝ is with the present embodiment step（1）﹞.
（11）Level Four extracts desalination
﹝ is with the present embodiment step（2）﹞.
（12）Crude oil after level Four extraction desalination is separated with extractant
﹝ is with the present embodiment step（3）﹞.
In implementation, the desalting effect of different extractants is shown in Table 3.
The desalting effect of the different extractants in the above-described embodiments of table 3.
。
Experimental example more than can be seen that the crude oil desalting side that the present invention is coupled based on solvent extraction with electro-desalting
Method, when spent glycol is as extractant, salt rejection rate is up to 83.8% under conditions of electric field presence, far superior to water as molten
The 53.35% of agent.
Above-described embodiment is only the preferred embodiment of the present invention, for example, the extraction described by the technique of the embodiment of the present invention
The series of power taking desalination is 1 grade, and it is convenient with research that this is intended merely to experiment.And can be based on crude in actual applications
The requirement adjustment desalination series of property and desalination depth.It is thus impossible to the content of embodiment is regarded as to base of the present invention
The limitation of the crude oil desalting method content coupled with electro-desalting in solvent extraction.Those skilled in the art is on basis of the invention
On the conversion of any unsubstantiality done and replacement all should belong to protection scope of the present invention.
Claims (4)
1. a kind of crude oil desalting method coupled with electro-desalting based on solvent extraction, it is characterised in that contain following steps：
Deal with objects and be：It is 0.96~1.2g/cm by secondary, tertiary recovery density3, emulsification is serious, be difficult under normal circumstances
The crude oil of sedimentation separation is realized by profit density contrast,
（1）Injection extractant
Extractant is injected in the crude oil, using extractant to the highly dissoluble of salt, the salinity to containing in crude oil takes off
Remove：Enter one-level after the crude oil and the blended valve of extractant in mass ratio 8~20: 1 are sufficiently mixed and extract desalter；
（2）One-level extracts desalination
Using 80~160 DEG C of extraction temperature, 30~60min is stopped in the weak electric field of 300V/cm~600V/cm, in 750V/cm
The highfield of~4000V/cm stops 5~30min, and extraction desalination is carried out using the forceful electric power field intensity of 750V/cm~4000V/cm；
（3）Crude oil after one-level extraction desalination is separated with extractant
Will be by step（2）Crude oil after one-level extraction desalination is discharged through the top of one-level extraction desalter；One-level extraction is de-
The extractant containing sewage saliferous is discharged through the bottom of one-level extraction desalter after salt；
（4）Secondary injection extractant
Will be by step（3）Crude oil after separation enters two after being sufficiently mixed with the blended valve of extractant in mass ratio 8~20: 1
Level extraction desalter；
（5）Two grades of extraction desalinations
Using 80~160 DEG C of extraction temperature, 30~60min is stopped in the weak electric field of 300V/cm~600V/cm, in 750V/cm
The highfield of~4000V/cm stops 5~30min, and extraction desalination is carried out using the forceful electric power field intensity of 750V/cm~4000V/cm；
（6）Crude oil after two grades of extraction desalinations is separated with extractant
Will be by step（5）Crude oil after two grades of extraction desalinations is discharged through the top of two grades of extraction desalters；Two grades of extractions are de-
The extractant containing sewage saliferous is discharged through the bottom of two grades of extraction desalters after salt.
2. it is as claimed in claim 1 to be based on the crude oil desalting method that solvent extraction is coupled with electro-desalting, it is characterised in that described
Extractant is ethylene glycol, glycerine, 1,2- propane diols, 1,3- propane diols, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, dipropyl two
Diethylene glycol dimethyl ether, dimethylamine, di-n-propylamine, cyclopropylamine, one or more of di-iso-butylmanice.
3. it is as claimed in claim 1 to be based on the crude oil desalting method that solvent extraction is coupled with electro-desalting, it is characterised in that described
Electric field is alternating current and direct current or impulse electric field.
4. it is as claimed in claim 1 to be based on the crude oil desalting method that solvent extraction is coupled with electro-desalting, it is characterised in that in step
Suddenly（6）Afterwards, can continue step（6）Crude oil after separation is adequately mixed with fresh extractant in mass ratio 8~20: 1
After enter back into next stage extraction desalter；The content of " one-level extraction desalination " and " two grades of extraction desalinations " is repeated, can be according to desalination
The requirement of depth increases the series of " extraction desalination ".
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|---|---|---|---|---|
| FR2503734A1 (en) * | 1981-04-13 | 1982-10-15 | Raffinage Cie Francaise | Crude or other heavy oil converted to lighter crude mixt. - by integrated distn., solvent deasphalting and coking |
| CN1049374A (en) * | 1990-09-15 | 1991-02-20 | 中国石油化工总公司 | From crude oil, remove the method for petroleum acid |
| CN103805227A (en) * | 2012-11-09 | 2014-05-21 | 长江(扬中)电脱盐设备有限公司 | Pre-treatment process method of high acid crude oil |
| CN104927895A (en) * | 2014-03-17 | 2015-09-23 | 碧海舟（北京）石油化工设备有限公司 | High-acid crude oil electro-desalting process |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2503734A1 (en) * | 1981-04-13 | 1982-10-15 | Raffinage Cie Francaise | Crude or other heavy oil converted to lighter crude mixt. - by integrated distn., solvent deasphalting and coking |
| CN1049374A (en) * | 1990-09-15 | 1991-02-20 | 中国石油化工总公司 | From crude oil, remove the method for petroleum acid |
| CN103805227A (en) * | 2012-11-09 | 2014-05-21 | 长江(扬中)电脱盐设备有限公司 | Pre-treatment process method of high acid crude oil |
| CN104927895A (en) * | 2014-03-17 | 2015-09-23 | 碧海舟（北京）石油化工设备有限公司 | High-acid crude oil electro-desalting process |
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